Let the countdown to the first rock contact begin. Beedee, did you use gloss spray paint or some form of bed liner?
After a lot research, and about 30 minutes in the paint aisle at Home Depot, I decided to use this. I figured it should suffice if I apply it in light coats, which I did. I basically used 1.5 cans per slider. Prior to paint, I scuffed with a scotch brite pad during the Dawn detergent wash (2x), then wiped with acetone (2x). It is suppose to be a Primer & Paint, time will tell. I read tons of threads on various forums on the subject, what worked for some, didn't work for others. Some used the "hammered" finish Rusto with success, but others hated it. Many said they used the Duplicolor Bed Liner with success, but others hated it. See where I'm going? Then there was the internal struggle of Matte v.s. Satin, but after a few minutes I figured the Matte and/or Satin would look more chalky, and retain dust. The Semi-Gloss seemed like a nice compromise, and will be easier to wipe the dirt/dust off. And
if or I should say
when it comes time to touch them up, I won't have to lay down a layer of primer, and then a layer of paint. I can simply scuff the area, wipe it clean, then hit it with the paint.
http://www.homedepot.com/p/Rust-Oleum-Painter-s-Touch-2X-12-oz-Semi-Gloss-Black-General-Purpose-Spray-Paint-249061/202071351
Is the front bracket of the passenger side slider (closest one in the photo) sitting up on hockey pucks? Love it!!! 
Good eye my friend! I also use them on my jack.
